What are Gemstone Absorption Spectra?
Learn how gems absorb wavelengths of light and how gemologists use gemstone absorption spectra to identify gems. There’s more to color than…
Learn how gems absorb wavelengths of light and how gemologists use gemstone absorption spectra to identify gems. There’s more to color than…
Sometimes, microscopic inclusions are the only way to distinguish natural from synthetic gems. This makes the microscope an essential lab instrument…
The glass used to make refractometer hemicylinders is susceptible to tarnish. Here’s a step-by-step guide for re-polishing a refractometer…
A dichroscope can distinguish the colors of pleochroic gems. Learn how gem cutters can use this tool to choose the best faceting designs for these…
Gemstone identification requires a good reference library and some basic gemology tools. Before you go shopping, learn more about what you’ll…
Learn how to determine a gem’s optic character with a refractometer and identify optical effects you may encounter during gem identification…
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